Troubleshooting

By | 18 de agosto de 2010
O site http://9tut.com possui exercícios direcionados para quem está se preparando para as certificações Cisco, inclusive o exame 640-802. Quem se interessar pode acessar o site pelo link ou nos acompanhar pelo blog, estarei selecionando semanalmente troubleshootings para postar.

A dica foi enviada pelo Maiquel, nosso mais novo amigo CCNA!

Question 1:

Refer to the exhibit. The network administrator is in a campus building distant from Building B. WANRouter is hosting a newly installed WAN link on interface S0/0. The new link is not functioning and the administrator needs to determine if the correct cable has been attached to the S0/0 interface. How can the administrator accurately verify the correct cable type on S0/0 in the most efficient manner?

remoteconnect1

A. Telnet to WANRouter and execute the command show interfaces S0/0
B. Telnet to WANRouter and execute the command show processes S0/0
C. Telnet to WANRouter and execute the command show running-configuration
D. Telnet to WANRouter and execute the command show controller S0/0
E. Physically examine the cable between WANRouter S0/0 and the DCE.
F. Establish a console session on WANRouter and execute the command show interfaces S0/0

Answer: D

Explanation:

The show controller command displays the information about the physical interface itself and the type of serial cable plugged into a serial port. In this case, it should be a DTE cable that plugs into a type of data service unit (DSU).

For your understanding, below is the output of this command:

show_controllers

From the output, we notice that serial 0/0 has a DTE cable and would get its clocking from the DSU.

Question 2:

A network administrator has configured two switches, named London and Madrid, to use VTP. However, the switches are not sharing VTP messages. Given the command output shown in the graphic, why are these switches not sharing VTP messages?

showvtp

A. The VTP version is not correctly configured.
B. The VTP operating mode is not correctly configured.
C. The VTP domain name is not correctly configured.
D. VTP pruning mode is disabled.
E. VTP V2 mode is disabled.
F. VTP traps generation is disabled.

Answer: C

Explanation

In the exhibit, the Domain Names of 2 switches are mismatched (one is “London” and the other is “Madrid”) so these switches do not share VTP messages -> The VTP domain name is not correctly configured. Notice that the Domain Names should be the same on both switches to share VTP messages

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Troubleshooting

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